Grinding and polishing attachment for rolling mills



April 18, 1933. H. A POUNG 1,904,385

GRINDING AND POLISHING ATTACHMENT FOR ROLLING MILLS Original Filed May 1928 2 Sheets-Sheet l g WIA'IIIIIIIIIIIIIIAE'IIIIA I l I ATTORNEY Aprll 18, 1933. H POUNG 1,904,385

GRINDING AND POLISHING ATTACHMENT FOR ROLLING MILLS Original Filed May 3, 1928 2 Sheets-Sheet 2 a; V I ""M /6' 1 E I V /Z [um-M'- 2 JJ .3 50 N F 15. BL

INVENTOR.

v ffiEHYA.-H7LZNE BY ATTORNEY.

Patented Apr. 18, 1933 PATENT OFFICE 1 iinaninqronme, or kniiosnawrsoonsm; essrenon or ONE-FOURTH T FRANK s.

' SYMMONDS, or KENOSHA, WISCONSIN GRINDING- AN!) POLISHING ATTACHMENT FOR ROLLING MILLS Application filed May 3, 1928, Serial No. 274,953. Renewed March 3, 1932.

1 This invention relates to'roll grinding'and polishing attachments .for rolling mills.

. The problem of protecting the work against 7 scarring by scale andother foreign matter and byblemishes produced in the surfaces I of the rolls by theimpression of such foreign matter thereon-is a serious one. It is customary to clean the rolls from time to time bythe use of a grinding plug? or stick 10? hi h ismanually inserted between the rolls and'dragged back and forth lengthwise therep of; andwhen the rolls are badly scarred it is necessary to remove and transport them to-a grindingmachine in order to render I5? them fitforffurther use. Such methods are laborious,ac'ostly, and entail a considerable lossof time. q,

One object of the present invention is the provision of an attachment 'for rolling mills i205 operable to prevent the accumulation of foreign matter on the rolls and to promptly remove vblemishesthereon as they may occur. The .use of such an attachment eliminates'the laborious grinding plug methodsheretomatter before serious damage can occur, substantially eliminates the special grinding processes heretofore'found necessary.

-.Another object is the provision of .a roll dressing attachment for rolling mills which y will maintain the roll surfaces true and in a smooth clean condition without interrupting or otherwise interfering with the rolling process-and in suchmanner as to avoid desection is taken in a transverse plane through the trunnions at the nearends of the rolls.

Fig. 2 is a top plan view of the attachment, on a larger scale, showing. the same ap- -L li d t the upper roll.

fore used and, by prompt removal of foreign posit of foreign matter from the rolls onto The rolling mill shown is of a well-known,

- type. 'It includes a pair of upper and lower '16 formed in end standards17. The spacing between the rolls is determined by adjustment of the usual jack screws, one of which is shown ale, which serve to-hold the upper bearing blocks 14 downwardly against the ressure of springs 19 interposed between theblocks. The rolls are rotated in opposite directions by the usual mechanism. In this instance the upper roll rotates clockwise and the lower roll counter-clockwise so that'the work passes between them from right to left.

. in Figure 1.

. As indicated in Figure 1 a separate grinding and polishing attachment is provided for each roll. Since the construction and operation of each is substantially identical. with'the other, a description of one willl 'suffice for both. Each includes a block20- ofcarborundum or other appropriate abrasive material preferably formed with a concave face 21 curved to fit the roll. Theblock is removably. seated within a socketed holder 22 and is normally retained against the face of theroll under resilient pressure ap-. plied through springs 23 interposed between the holder '22 and an appropriate carrier plate 24.. In this instance guide pins 25, anchored in the holder 22 and projecting upwardly through the springs 23 and plate24, retain the holder, against lateral displacev ment relative to the plate. Any appropriate means such as nuts 26 threaded on the pins 25 may be employed to draw the holder away .from'the face of the roll to thereby permit removal of the block for inspection, 99 replacement or refinishing.

'- The carrier-plate is mounted for r-ecipro cation lengthwise of the roll so that during rotationof the roll-the block 20 follows a spiral path about the surfacenthereof. In each attachment shown the carrier plate .24

is supported by apair of upright laterally spaced webs 27 cast integral therewith and provided with bearing lugs 28 suitably bored to receive ascrew 29, which extends parallel to and at a definite distance from the aXis of the associated roll. In the attachment for the upper roll the screw 29 is securely anchored at opposite ends in appropriate brackets 30 fixed to the upper bearing blocks 14 so that the spacing between the screw and roll is maintained during vertical adjustment of that roll. Since the working axis of the lower roll is definitely fixed the screw 29, associated with that roll, is securely anchored in similar brackets 30 conveniently fixed to the end standards 17 of the machine. Each carrier plate is reciprocated lengthwise of the associated screw by appropriate means such as a nut 31 threaded on the screw and confined between the bearing lugs 28 of the plate. The nut in this instance is rotated alternately in opposite directions through a chain 32 driven by a reversible electric motor 33 that travels with the carrier. The motor is shown mounted upon a container 34 to be hereinafter described. The motor is controlled by a reversing switch 35 of a well-known type electrically connected therewith and controlled by a plunger 36 reciprocable in the switch housing. The switch is preferably mounted upon the carrier plate with the plunger 36 aligned with stop screws 37 adjustably anchored within the upper bearing blocks 14. The arrange-- ment is such that rotation of the nut 31 in one direction causes the carrier to travel along the screw in one direction until the plunger 36, carried by the carrier, is forced endwise by contact with one of the screws 37 so as to reverse the switch and motor. Rotation-of the nut is thus reversed and the carrier travels along the screw in the opposite direction until the switch and motor are again reversed by engagement of the plunger 36 with the other screw 37.

The abrasive action of the block upon the roll, during reciprocation of the block and simultaneous rotation of the roll, is ordinarily sufficient to loosen and remove at least the coarser particles of foreign matter and to erase such scars as may occur from time to time It will be noted that this abrasive action, effected in this manner, is substantially uniform throughout the face of the roll so that the contour of the roll remains practically unchanged.

Y Each attachment shown also includes additional means for cleaning and polishing the roll, and for collecting all matter removed by the abrasive element before it has an opportunity to deposit upon and mar the surface of the work. To this end a closed sheet metal container 34 is provided, hingedly connected, as at 38 to the carrier plate 24, and formed with a concave bottom 39 curved to fit the roll. The bottom of the container is preferably covered with a sheet of felt 40 or the like which serves to wipe the face of the roll and an additional strip of felt 41 or the like is inserted at the lower corner of the container for a similar purpose. A partition 42 separates the container into two compartments 43 and 44. A rotary brush 45, extending across and within the forward compartment 43, projects through an appropriate opening 46 in the bottom of the container into contact with the roll. A buffer roller 47, extending across and within the rear compartment 44, projects through a similar opening 48 into contact with the roll. The brush and roller 47 are continuously driven in the direction of the arrows by appropriate means such as a belt and pulley connection 49 with an electric motor 50 mounted on the container. The-brush 45 and buffer roller 47 are continuously cleaned by blastsof air delivered from appropriate channels 51 and 52, respectively, provided within the compartments 43 and 44. The channels extend completely across the container and are formed with narrow slits 53 and 54, extending the full length'thereof and designed to direct an air blast against the periphery of the brush and roller, respectively, throughout the length thereof. The channels are supplied with compressed air from an appropriate source through piping 55. The air escapes from-compartment 43 through an appropriate port 56 and from compartment 44 through a similar port 57 to which a bag 58 is applied to filter out and retain the dust and dirt carried by the escaping air. The combined action ofthe brush45, buffer roller 47, felt pad 40 and felt strip 41 maintains the surface of the roll in a clean polished condition.- Various changes may be made in the embodiment of the invention hereinabove specifically described Without departing from or sacrificing the advantages of the invention defined in the appended claims. .Iclaimz- Y 1. A roll dressing attachment for rolling mills having an adjustable rol1, sa.id'attachment comprising an abrasive element for con-. tact with the roll, means for reciprocating said element along the roll during operation of the mill, and means for maintaining a definite relation between said element and rollduring adjustment of the roll.

2. A roll dressing attachment for rollin I mills having an adjustable roll, said attachment comprising roll dressing means,.means' for reciprocating said dressing means along the roll during operation of the mill,*a.nd supporting means for said dressing means movable during adjustment of said roll to maintain a definite relation between said dressing means and roll irrespectiveof the adjusted position of the roll. 7 i

3. A roll dressing attachment for rolling mills comprising an abrasive element forcon tact with a roll, means mounted parallel to the roll for maintaining a definite relationbetween said element and roll regardless of roll adjustment, means for reciprocating said tact with a roll, means mounted parallel to.

the roll for maintaining a definite relation between said element and roll regardless of roll adjustment, means for normally maintaining said element in contact with the roll during rotation of the roll to grind the surface thereof, and means associated with said element for cleaning the surface of the roll after the grinding action of said element thereon.

5. A roll dressing attachment for rolling mills comprsing an abrasive element for contact with a roll, means mounted parallel to the roll on which said element is reciprocable, said means maintaining a definite relation between the roll and element regardless of roll adjustment, means for reciprocating said element along the roll to grind the surface thereof, and means reciprocating with said element. for cleaning the surface of the roll after the grinding action of said. element thereon.

6. A roll dressing attachment for rolling mills comprising an abrasiveelement for contact with a roll for grinding the surface thereof during rotation of the roll, a container associated with said element, a driven rotary element within said container for cleaning the roll subsequent to the grinding action of said abrasive element thereon, and means for directing a continuous blast of air against said rotary element to clean the same.

7. A roll dressing attachment for rolling mills comprising an abrasive element for contact with a roll for grinding the surface thereof during rotation of the roll, a container associated with said element, a rotary brush within said container for brushing the roll, a bufier roller within said container for polishing the roll, and means for rotating said brush and roller.

8. A roll dressing attachment for rolling mills comprising an abrasive element for contact with a roll to grind the surface thereof during rotating of the roll, rotary driven means associated with said element for cleaning the surface of the roll subsequent to the grinding action thereon, and pneumatic means for continuously cleaning said roll cleaning means.

10. A roll dressing attachment for rolling mills comprising an abrasive element for contact with a roll, means for reciprocating said element along the roll during rotation of said roll, and roll cleaning means connected with said element and reciprocable therewith along the roll for removing matter loosened by said element, said cleaning means including a receptacle for receiving the loosened material to prevent'deposit thereof onto the work passing through the mill. I

11. A roll dressing attachment for rolling mills comprising an abrasive element for contact with a roll, means for normally maintaining said element in contact with the roll during rotation of the roll to grind the surface thereof, and means associated with said element for cleaning the surface of the roll after the grinding action of said element thereon, said cleaning means including a receptacle for receiving matter removed from the roll to prevent deposit thereof onto the work passing through the mill.

12. A roll dressing attachment for rolling mills comprising an abrasive element for contact with a roll, means for, reciprocating said element along the roll to grind the surface thereof, and roll cleaning means reciprocating with said; element for removing and receiving matter from the roll to thereby prevent deposit of such matter onto the work passing through the mill.

' In witness whereof, I hereunto subscribe my name this 5th day of November, 1927.

, HARRY POLING.

9. A roll dressing attachment for rolling mills comprising a container mounted to travel along a roll, a rotary brush within said container for brushing the roll, a buffer roller within said container for polishing the roll, pneumatic means for cleaning said I brush and roller, means for driving said brush and roller, and means for reciprocating said container along the roll. 

